Lock bolt operated door fastener



Aug. 10, 1948. w. F. BANHAM I LOOK BOLT OPERATED DOOR FASTENER Filed April 29, 1947 rlll llllllllll .h H I I HH HHH I n doo'r jamb which are shot upon operation of the Patented Aug. 1c, 1948 2,446,735

ii isiiisE D 'S 'i -ATES RICE --LooK Bonn6i ERATnn noon FASTENER "WilliamFr'atncfs-Banliaih, Londoi Ecigland Application-April 2-9; 1$47-,2Seria1 Npi 744,5 44

In Great Britain.-lVIarch.26,-.-1946 Section 1, Public Lawbstmugist $51 946 3 Claims. (Gl:i 292i-'-33) l p 2 This invention relates v to improvements in ii -Referring" to :the dra'Mngs whichiillustrate a looks or door fastenings of 'thetype comprising preferred construction according totthednvena plurality of independent bolts mounted in' 'the tili, lib-indicates iaizdoornand M ai f'doorjamb, two niorti as bolts l 2; B2,: being 'fittediwithin the normal bolt or spring latch of the doorg'the in ijamb H to"co operatei with flocking recesses l3,

l3; ip'r'ovidedirr the "i'clooni I fls' Preferably; w the zmorticeobolts are z fitte'd =adj-a'cent the-;-top and or spring latch is withdrawn. ibottom of the td'oora iamb soctbat when in the 4 The present invention is-co'ncerned niore esdocking-position--theyzsengage thez; edge of ithe pecially with a door fastening for use with locks door at the top and bottom and prevent it being of the Yale type, the latching of which is inopened when the normal door latch is in the tended to effect the automatic operation of secengaged position. The mortice bolts are interondary bolts mounted in the jamb of the door. connected and simultaneously actuated by an According to the invention there is provided at axially rotatable rod l4 carrying an abutment least two mortice bolts fitted within the lamb member in the form of a plate l5 movable by of a door and interconnected by an axially rothe spring latch l6 of the normal door look i! tatable rod carrying an abutment member movato move the rod l4 about its axis. The extremible by the latch of the door lock to force said ties of the rod engage the mortice bolts through mortice bo ts i to engagement th t e the intermediary of levers l8 serving to move resilient means being provided to return said said mortice bolts l2, l2, into locking engagemortice bolts to the inoperative position when ment with the recesses l3, l3, when the spring the door latch is withdrawn to open the door. latch i6 is engaged with the box staple 19 of Preferably, the mortice bolts are fitted adja the door lock H. The mortice bolts are spring Ce t e t p d bot of the (1001' l S0 loaded for automatic return by hair pin springs that when in t locking p s t n t y engage 20 when the spring latch I6 is withdrawn from the edge of the door near the top and bottom and th bo sta l l9. p ev n t being opened W n e norm l d The three locks i. e. the two mortice bolts and latch is engaged. The mortice bolts are spring the spring latch operate simultaneously when o d so that y are automatically returned the tongue of the spring lock is shot into its box to the unlocked position or the interconnecting staple on the closing of the door, or in the case rod carrying the abutment may have a coiled f d ad 1 01; by the turn of the key.

dependent bolts engagingthe door and preventing the openingthe'reof "until the normal bolt Sp g mounted thereon which is placed un e The mortice bolts [2, I2, are each fitted in a tension when the rod is act d through the housing 2| which is secured Within the jamb of abutment thereon and serves to return the morth d by an f a ba plat 22. The tlce bolts by means of levers fixe t0 t D housing is a rectangular tubular cross-section ating rod. within which the mortice bolt I2 is slidably fitted,

In order that the inventi n m y be clearly the housing being provided with an inwardly understood and readily carried into eifect, referprojecting pin 23 whi h engages a groove 24 n ence is directed to the p nyin r w n the mortice bolt and in conjunction with a pin whe n! 25 fixed within the groove, limits the relative Fi 1 is a front elevation p y in section movement between the mortice bolt and the of a door jamb fitted with a ee ast in housing. In addition, the mortice bolt I2 is proaccordance with the invention and showing a vided 1th a projecting m 25 whi h n ag a @1001 P y Closed o the l channel 21 formed in the side wall of the hous- Fig- 2 is a si View o 1 With the 61001 ing 2| and closed at the outer end as at 28. The compl t y closedclosed end 28 in conjunction with the pin 26 Fig. 3 is a section on the line 33, Fi 1- limits the movement of the mortice bolt in the Fi 4 is a longitudinal section f the mortice outward or looking direction. A recess 29 is bolt housing, and formed in that side of the mortice bolt opposite Fig. 5 is a side elevation of the mortice bolt, t the side carrying the pin 26 t form an tand ment for one end of the hair pin spring 20 which Fig. 6 is an end view of Fig. 5, and bears against the rear edge of the recess 29 and Fig. '7 is a plan of Fig. 4. normally maintains the mortice bolt in the re- Fig. 8 is a plan of Fig. 5. tracted position, as shown in Fig. 3. The hair Fig. 9 is an end view of Fig. 8. pin spring 20 is suitably mounted in the jamb of In place of the hair pin springs 30, the axially rotatable rod l4 may be provided with a coilspring 32 which is secured thereto at one end and anchored at the other end in-the slot 33 provided in the door jamb for the-reception of the rod M. A slot 34 in the housing and coin:

cident with the recess 29 permits the lever 18 to enter the housing and contact the-mortice bolt.

What I claim and Patent is:

1. A lock or door fastening of the kind described having at least two mortice bolts fitted within the jamb of a door and interconnected by an axially rotatable rod carrying an abutment member movable by the latch of the door lock to force said mortice bolts into engagement with the door, resilient means being provided to redesire to secureby Letters turn said mortice bolts to the inoperative position when the door latch is withdrawn to open the door.

2. A look or door fastening as claimed in claim 1, wherein the axially rotatable rod carries levers operatively associated with the mortice bolts to move them to the locking position, the mortice bolts being spring loaded for return to the inoperative position.

3. A look or door fastening as claimed in claim 1, wherein the mortice bolts are mounted in a tubular housing of rectangular cross-section secured-to the door jamb, means being provided to limit the relative movement between the mortice bolts and their housing.

' WILLIAM FRANCIS BANI-IAM.

REFERENCES CITED following references are of record in the file of this patent:

UNITED STATES PATENTS 

